@Patti
The warning says: “some code in the plugin or theme running too early.”
To eliminate any possible Xtreme issues in this. please check in your cache and optimization plugin(s) to ensure that nothing from Weaver Xtreme is being optimized or compresses by these plugins. (As Extreme is already optimized, a second optimization may result in unexpected results.)
In the meantime, adding this code in the /wp-includes/functions.php file ought to stop the error message showing to one and all:
add_filter('doing_it_wrong_trigger_error', '__return_false');
Regards!
@Weaver